/Engine/Source/Runtime/Engine/Classes/Engine/CollisionProfile.h
if you'd like to just add custom channels, not changing anything else engine defined if you'd like to override all about profile, please use +Profiles=(Name=NameOfProfileYouLikeToOverwrite,....)
struct FCustomProfile
TArray<FRespon...
CustomResponses
Types of objects that this physics objects will collide with.
FName
Name
Name of new profile to add